diff --git a/CHANGELOG.md b/CHANGELOG.md
index af0aace..be257a8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,3 +14,9 @@ if the `system.stateVersion` option is set to `"20.09"` or later.
   If you are not on `release-19.09` yet,
   either or attempt an upgrade to `release-19.09`
   and follow the instructions, or backup and reinstall (preferred).
+
+## Known issues:
+
+* If `make` fails on your device with `Function not implemented`,
+  report that in https://github.com/t184256/nix-on-droid/issues/91
+  and consider setting `system.workaround.make-posix-spawn.enable = true;`
diff --git a/modules/workaround-make.nix b/modules/workaround-make.nix
index b1ee44b..071ef75 100644
--- a/modules/workaround-make.nix
+++ b/modules/workaround-make.nix
@@ -43,11 +43,13 @@ in
         enable the option; nix-on-droid switch, relogin, build,
         disable the option; nix-on-droid switch, relogin.
 
-        If you leave it on Nix-store validation will fail,
+        If you leave it on, Nix-store validation will fail,
         repairs will break the working make,
         updates will do bad things. You have been warned.
 
-        Consider building remotely as an alternative for such devices:
+        If you find yourself needing that hack, please report details at
+        https://github.com/t184256/nix-on-droid/issues/91
+        and consider building remotely as an alternative for such devices:
         https://github.com/t184256/nix-on-droid/wiki/Remote-building
       '';
     };